diff --git a/.gitignore b/.gitignore
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+# 환경변수: 실제 값(.env)은 커밋하지 않는다. 템플릿(.env.example)만 커밋한다.
+.env
+.env.*
+!.env.example
+
+# Python 바이트코드/캐시 — 절대 커밋하지 않는다.
+__pycache__/
+*.py[cod]
+*$py.class
+.pytest_cache/
+
+# 가상환경
+.venv/
+venv/
+
+# 생성물(orval/fastapi OpenAPI 스펙). 필요 시 재생성한다.
+negodata/backend/openapi.json
+
+# 로컬 에이전트 지침 — 커밋하지 않는다.
+CLAUDE.md
+
+# OS
+.DS_Store
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